Since everyone’s winning rate is based on throwing a sieve, why not throw a sieve to open an order?

Because throwing a sieve can only determine the direction, long or short, the sieve cannot tell you the opening point and stop loss point.

There is not always a good opening point and stop loss point. A good opening point must be a point with a small stop loss and a large expected profit. This is called a large profit-loss ratio.

By now you should understand that no one is pointing back, judgment is not important, we cannot improve the winning rate, we have to rely on a large profit-loss ratio.